Apparatus and method for time domain bandwidth part (TD-BWP) switching

Abstract

Some aspects of this disclosure relate to apparatuses and methods for implementing time domain bandwidth part (TD-BWP) switch for balancing between the UE power consumption and a latency of the UE. For example, a UE can be configured to add a plurality of padding bits to a transport block (TB) to reach a predetermined slot capacity for one transmission time interval (TTI) associated with UE traffic in response to determining that a parameter associated with the UE traffic meets a condition. The UE can be further configured to transmit the TB over the TTI to the base station and receive a message from the base station. The UE is further configured to change a time domain bandwidth part (TD-BWP) based on the received message.

What is claimed is: 
     
         1 . A base station, comprising:
 a transceiver configured to wirelessly communicate with a user equipment (UE), wherein the UE operates at a first time domain bandwidth part (TD-BWP); and   a processor communicatively coupled to the transceiver and configured to:
 receive, using the transceiver, a message from the UE during a prescheduled uplink grant; 
 examine one or more bytes within the message; 
 in response to the one or more bytes indicating a request for a change of the first TD-BWP, determine that a parameter associated with UE traffic meets a condition; 
 in response to determining that the parameter associated with the UE traffic meets the condition, change the first TD-BWP to a second TD-BWP to be used by the UE; and 
 transmit, using the transceiver, a downlink control information (DCI) message to the UE indicating the change to the second TD-BWP. 
   
     
     
         2 . The base station of  claim 1 , wherein the one or more bytes indicating the request for the change of the first TD-BWP are based on a traffic type associated with the UE traffic. 
     
     
         3 . The base station of  claim 1 , wherein the one or more bytes indicating the request for the change of the first TD-BWP are based on a block error rate (BLER) associated with the UE traffic or a number of retransmissions associated with the UE traffic. 
     
     
         4 . The base station of  claim 1 , wherein to determine that the parameter associated with the UE traffic meets the condition, the processor is further configured to:
 determine a signal to interference and noise ratio (SINR) value;   compare the SINR value to a threshold; and   in response to the SINR value being less than the threshold, determine that the parameter associated with the UE traffic meets the condition.   
     
     
         5 . The base station of  claim 4 , wherein the processor is configured to:
 receive, using the transceiver, a message from the UE indicating the SINR value; or   measure the SINR value for one or more uplink transmissions from the UE.   
     
     
         6 . The base station of  claim 1 , wherein to determine that the parameter associated with the UE traffic meets the condition, the processor is further configured to:
 determine hybrid automatic repeat request (HARQ) acknowledgment (ACK) information or HARQ negative acknowledgement (NACK) information;   compare the HARQ ACK information or the HARQ NACK information to a threshold; and   in response to the HARQ ACK information or the HARQ NACK information being less than the threshold, determine that the parameter associated with the UE traffic meets the condition.   
     
     
         7 . The base station of  claim 1 , wherein to determine that the parameter associated with the UE traffic meets the condition, the processor is further configured to:
 receive, using the transceiver, a channel state information (CSI) message from the UE, the CSI message including downlink quality channel information;   compare the downlink channel quality information to one or more thresholds; and   in response to the downlink channel quality information satisfying the one or more thresholds, determine that the parameter associated with the UE traffic meets the condition.   
     
     
         8 . The base station of  claim 1 , wherein to determine that the parameter associated with the UE traffic meets the condition, the processor is further configured to:
 receive, using the transceiver, a sounding reference signal (SRS) message from the UE, the SRS message including uplink channel quality information;   compare the uplink channel quality information to one or more thresholds; and   in response to the uplink channel quality information satisfying the one or more thresholds, determine that the parameter associated with the UE traffic meets the condition.   
     
     
         9 . A method, comprising:
 comparing, by a base station in communication with a user equipment (UE), at least one of a signal to interference and noise ratio (SINR) value, hybrid automatic repeat request (HARQ) acknowledgment (ACK) information or HARQ NACK information, downlink channel quality information, or uplink channel quality information to a respective threshold, wherein the UE operates at a first time domain bandwidth part (TD-BWP);   in response to the at least one of the SINR value, the HARQ ACK information or the HARQ NACK information, the downlink quality information, or the uplink quality information satisfying the respective threshold, determining that a parameter associated with UE traffic meets a condition;   in response to determining that the parameter meets the condition, changing the first TD-BWP to a second TD-BWP to be used by the UE; and   transmitting a downlink control information (DCI) message to the UE indicating the change to the second TD-BWP.   
     
     
         10 . The method of  claim 9 , further comprising:
 receiving a message from the UE during a prescheduled uplink grant;   examining one or more bytes within the message; and   in response to the one or more bytes indicating a request for a change of the first TD-BWP, determining that the parameter associated with the UE traffic meets the condition,   wherein the one or more bytes indicating the request for the change of the first TD-BWP are based on a traffic type associated with the UE traffic or are based on a block error rate (BLER) associated with the UE traffic or a number of retransmissions associated with the UE traffic.   
     
     
         11 . The method of  claim 10 , wherein the determining that the parameter associated the UE traffic meets the condition further comprises:
 receiving a message from the UE indicating the SINR value;   determining the SINR value;   comparing the SINR value to the respective threshold; and   in response to the SINR value being less than the respective threshold, determining that the parameter associated with the UE traffic meets the condition.   
     
     
         12 . The method of  claim 9 , wherein the determining that the parameter associated with the UE traffic meets the condition further comprises:
 determining the HARQ ACK information or HARQ NACK information;   comparing the HARQ ACK information or the HARQ NACK information to the respective threshold; and   in response to the HARQ ACK information or the HARQ NACK information being less than the respective threshold, determining that the parameter associated with the UE traffic meets the condition.   
     
     
         13 . The method of  claim 9 , wherein the determining that the parameter associated with the UE traffic meets the condition further comprises:
 receiving a channel state information (CSI) message from the UE, the CSI message including the downlink channel quality information;   comparing the downlink channel quality information to the respective threshold; and   in response to the downlink channel quality information satisfying the respective threshold, determining that the parameter associated with the UE traffic meets the condition.   
     
     
         14 . The method of  claim 9 , wherein the determining that the parameter associated with the UE traffic meets the condition further comprises:
 receiving a sounding reference signal (SRS) message from the UE, the SRS message including the uplink channel quality information;   comparing the uplink channel quality information to the respective threshold; and   in response to the uplink channel quality information satisfying the respective threshold, determining that the parameter associated with the UE traffic meets the condition.   
     
     
         15 . A user equipment (UE), comprising:
 a transceiver configured to wirelessly communicate with a base station; and   a processor communicatively coupled to the transceiver and configured to:
 in response to determining that a parameter associated with UE traffic meets a condition, transmit, using the transceiver, a first message to the base station during a prescheduled uplink grant, 
 wherein the UE operates at a first time domain bandwidth part (TD-BWP) and the message comprises one or more bytes indicating a request for a change of the first TD-BWP; 
 receive, using the transceiver, a second message from the base station; and 
 change the first TD-BWP to a second TD-BWP based on the received message. 
   
     
     
         16 . The UE of  claim 15 , wherein to determine that the parameter associated with the UE traffic meets the condition, the processor is configured to:
 measure a block error rate (BLER) associated with the UE traffic;   compare the BLER with a threshold; and   in response to the BLER being greater than the threshold, determine that the parameter associated with the UE traffic meets the condition.   
     
     
         17 . The UE of  claim 15 , wherein to determine that the parameter associated with the UE traffic meets the condition, the processor is configured to:
 measure a number of retransmissions associated with the UE traffic;   compare the number of retransmissions with a threshold; and   in response to the number of retransmissions being greater than the threshold, determine that the parameter associated with the UE traffic meets the condition.   
     
     
         18 . The UE of  claim 15 , wherein to determine that the parameter associated with the UE traffic meets the condition, the processor is configured to:
 measure a traffic type associated with the UE traffic;   compare the traffic type with a plurality of traffic types; and   in response to the traffic type being one of the plurality of traffic types, determine that the parameter associated with the UE traffic meets the condition.   
     
     
         19 . The UE of  claim 15 , wherein the processor is further configured to transmit, using the transceiver, a third message to the base station, the third message including channel quality information for an uplink channel or for a downlink channel.